Read responses from a file

Description

Usage

Arguments

Details

Included for those who are too faint-hearted to write
as.matrix(read.table(file, head=F)). Of course, data can be entered
into R in many other ways.

The data values in the file must be separated with blanks.

Responses are the empirical data used in IRT. Note that irtoys deals
with models for dichotomous data, and typically expects data consisting of
zeroes and ones, without any missing values (non-responses are considered as
wrong responses). In fact, there are only two commands in irtoys that
accept other kinds of data: sco and tgf.

read.resp does accept missing data and values other than 0 and 1. Use
sco and a key to score multiple choice responses to 0/1. If you have
dichotomous data that contains NAs, you can use sco without a key to
change all NA to 0.

Value

A matrix, typically of zeroes and ones, representing the correct or
wrong responses given by persons (rows) to items (columns).